Steel: Steel can soften and melt with exposure to extremely high temperatures. f steels add passive fire protection, it can sustain greater temperatures, thus, provide additional safety. 

Concrete : is a material that is often locally sourced and thus typically requires minimal energy to transport to building sites. Rebar for concrete is often produced from recycled steel. At end of life, concrete can be crushed and recycled but the recycled material cannot be used for new building concrete.

Steel:  According to the British publication Building, 85% of steel is recycled, a process made easier by the fact that magnets are used in the process to sort steel.Steel fabrication made be done at a significant distance from a building site, increasing the energy needed for transport.

Steel is often perceived to be inert and resilient too. Terms such as “Iron Age” suggest an ancient durability, although Iron Age artefacts are comparatively rare precisely because they rust. If construction steel is visible, it can be maintained – for instance, when the Sydney Harbour Bridge is repeatedly painted and repainted.

Steel frame structures are way too limited to industrial structures, temporary sheds etc. and all. The other problem with steel structures are analysis and design. The curriculum in Structural Designs does include Steel Structures, though very less people are inclined towards it. Analysis of multi storey steel frame requires high amount of precision on deciding the connection type, that is simple, rigid or semi rigid. The member design for steel structures takes way less time as compared to the connection design. So, in all 70% time amounts for connection design in a project, around 30% for member design. Steel frames require skilled labour too, for erection purposes. Steel also has a high tensile and compressive strength than RC.

Reinforced Concrete Structures:

Highly used for varied purposes. Raw materials for concreting are abundantly available, leading to lesser cost than Steel. Analysis and design observes general principle. Connection design is really simple owing to monolithic behaviour of hardened concrete. Less skilled labour required for erection purposes. Abundant labour available too for RC structures.

Pros (Steel frame structures)

Cons

Concrete frame construction
- Cement comprises 7 to 15 percent of total concrete volume. As an alkaline material, wet cement is caustic, and can cause severe chemical burns to exposed skin and eyes. Thus, working with fresh concrete presents an obvious risk. 

-Rotating machinery is always a potential source of injury on a jobsite. Early-entry saws, concrete/masonry saws, cut-off saws, and power trowels pose a threat to appendages when used improperly. In addition, any sustained or sudden noise above 85 decibels emanating from machinery can be damaging to the ear.

Composite steel floors are given the highest (A+) environmental rating in the BRE’s Green Guide to Specification[2].

Because steel structures are significantly lighter than concrete equivalents, they require less extensive foundations, which reduces the environmental impact of the build. If steel pile foundations are used, these can be extracted and recycled or reused at the end of a building’s life, leaving no waste material on site.

Long-span steel solutions provide flexible clear span spaces that future-proof a building, offering an increased lifetime. Steel structures are durable and can be readily adapted, improving their economic viability as they can easily be updated or modernised.

With proper engineering, concrete building can also offer uninterrupted floorplates.

Steel: Steel has the highest strength-to-weight ratio of any construction material.With new construction methods, steel buildings remain a popular choice for office and multifamily developers.
Steel can accomplish extremely long spans in structures and very open-bay footprints without intermediate columns. It’s a very flexible material in terms of different ways to address design requirements.